Why won't ssh start?

Question

linux

I bought a brand new kvm, I
connect via shh =>

ssh -p 49190 [email protected]
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the ED25519 key sent by the remote host is
SHA256:F0d7tqos+HbZuwHf/SVrFAo40KxXEpPesXDEnT+uqb0.
Please contact your system administrator.
Add correct host key in /home/adel/.ssh/known_hosts to get rid of this message.
Offending ED25519 key in /home/adel/.ssh/known_hosts:12
  remove with:
  ssh-keygen -f "/home/adel/.ssh/known_hosts" -R "[some.n5zdn.vps.myjino.ru]:49190"
ED25519 host key for [some.n5zdn.vps.myjino.ru]:49190 has changed and you have requested strict checking.
Host key verification failed.

Look at /home/adel/.ssh/known_hosts"

some.n5zdn.vps.myjino.ru, ip_server => сертификат все на одной строке

What is happening to him?

Answer 1

It's clearly written there!
> ED25519 host key for ... has changed and you have requested strict checking.
> Host key verification failed.
The host key has changed. If this is how it should be, then enter:
Then the key fingerprint will be deleted from the file, and when you reconnect, you will be prompted to add the key to the list of known ones.

Answer 2

Delete /home/adel/.ssh/known_hosts and ssh again